Scientific stay of students from GTU Tbilisi at the Institute of Structural Geology at KIT

Between October 18 and November 14, Anzor Giorgadze (PhD student at GTU Tbilisi) and Mariam Bekurashvili (master student at GTU Tbilisi) visited the institute of Structural Geology at KIT. Based on their own rock samples from outcrops close to the Enguri Dam, rock plugs and thin sections were prepared and subsequently analyzed for petrophysical properties (e.g., porosity, permeability, wave velocities) and petrographical characteristics (see photos). The data they acquired complement the data collected from the KIT-2 core that was drilled close to the Enguri Dam.

 

Geomechanic Workshop at Enguri September 2022

DAAD SDG-Caucasus: Field Trip to Enguri and Course Geomechanics September 19–September 24

After arrival on Monday, September 19, the 10 students of TSU and GTU and the accompanying Professors Kalabegishvili (GTU) and Melilkadze (TSU) have been welcome by Dr. Birgit Müller, Dr. Thomas Röckel, Thomas Niederhuber and Sam Rasalingam.

They got a brief explanation to the site of the Enguri High Dam and visited installations of KIT-experts.

On Tuesday morning B. Müller provided a general introduction to Sustainable Development Goals and especially the role of geosciences to  achieve the UN sustainable development goals.

The second part of the morning lectures was devoted to an introduction to geomechanics and the theory of tectonic stress.

In the afternoon the group used the possibility of sunny weather to do logging with acoustical televiewer and a gammy ray tools in two boreholes located on the top of Enguri High Dam. These measurements provide insight into the subsurface fracture and stress system. Thereby the students and their professors detected a significant difference in water level between the two wells and thus actively contributed to research at Enguri Dam.

In the evening the group got a guided tour by professor M. Kalabegishvili to the inside of the Enguri Dam, and to the so called power tunnel with the big butterfly valves. During this part of the field trip  technical explanations of dam building and operations have been provided.

Wednesday morning provided an introduction to wireline logging and especially to the functionality of the logging tools used the day before.

In the afternoon the student groups have been divided in order get smaller groups for the Core Scanner and the core analysis lectures. Core Scanning was shown by Sam Rasalingam to the students. Students got practical experience using the Core Scan and they also had fun scanning a bottle.

Thursday morning was again devoted to Core Scanning and investigation of cores. Expert Thomas Röckel with his experience from the German Deep Drill Hole KTB (9 km depth) showed the students how to distinguish natural fractures from induced fractures. Furthermore, how the minimum horizontal stress orientation can be detected from induced fractures in cores.

On Thursday afternoon the geodetic team of KIT took the students to the site of the ground-based SAR and explained the technology and also the first results of the measurements.

Friday was devoted to learn about the Software tool WellCad, with which the data of the logging can be analysed. The trainer was Thomas Niederhuber who thanks to ALT company organised licences for the software for the students. This software enables to analyse the well logging data and to pick fractures therein. These fractures lateron can be compared to the fractures picked in the cores. This approach enables to orient the cores. This is important to obtain a better understanding of the open fracture systems and thus fluid flow in the underground.

The field trip provided an introduction to how geosciences can contribute to sustainable development of  Georgia. Furthermore, we hope that the team of the KIT helped Georgian students to learn technology tin geosciences.


2022 Geomechanics Course

in the Framework of the DAAD Sustainable Development Goal Project of KIT, TSU and GTU based on Data of the DAMAST-Transfer project

Motivation and Goal of the Course

The global demand for energy and minerals is increasing. However, the challenge is to produce them sustainably with limited environmental impact. Research and new technological solutions have significant economic and political implications. Supply with energy and minerals involves processes for which geomechanical understanding is required.
The 17 Sustainable Development Goals (SDGs) of the United Nations are an urgent call for action by all countries in a global partnership. The implementation of the SDGs requires capacity building.
The DAAD uses funds from the Federal Ministry for Economic Cooperation and Development (BMZ) to promote higher education partnerships in areas that are relevant to the Sustainable Development Goals (SDG) and to establish high-performing higher education institutions in partner countries and in Germany and to stabilise existing cooperation structures. Research and higher education has to be prepared for the consequences of climate change and the challenges in the supply with clean energy. The SDG-DAAD project of KIT, TSU and GTU aims to improve the implementation process of SDG in the South Caucasus.
The Geomechanics Course is one course within the joint KIT, TSU and GTU project and focuses on the state of stress at high dams, the possibility to monitor the stress field and provides practical information on the analysis of drill cores and data from borehole logging.
The equipment and data used for the course results from the DAMAST-Transfer project which aims to investigate the processes of induced seismicity during the construction and operation of dams, to test and further develop suitable monitoring of relevant parameters and to transfer the results into practice. It is based on the previous project DAMAST.
 

Course Structure and Layout

Monday, September 19 2022

  Arrival

Tuesday, September 20 2022

Morning

Introduction: SDGs and the potential role of geosciences in contributing to the SDGsGeneral Introduction to Geomechanics
The why
Stress Tensor
Stresses around Boreholes
Time for Questions

Birgit Müller
Afternoon

Stress induced failure features in boreholes  which can be identified by logging
•    Breakouts
•    Drilling Induced Fractures
•    Petal Centerline Fractures
•    Core Disking
Time for Questions

Birgit Müller/
Thomas Röckel
Afternoon How to work with Drill Cores (theory and practice)

Thomas Röckel

Wednesday, September 21 2022

Morning

Logging Tools
•    Introduction
•    Gamma Ray
•    Oriented Four Arm Caliper Tool
•    Acoustic Borehole Televiewer
•    Optical Borehole Televiewer
Time for Questions

Birgit Müller
Afternoon Practical Borehole Logging Birgit Müller,
Thomas Niederhuber 

Thursday, September 22 2022

Morning

The Core Scan – Introduction  
Core Orientation: Motivation  
Core Base Software Introduction and Showing of Examples
Best Practice of Using Core Base
Time for Questions

Thomas Niederhuber,
Sam Rasalingam

 

Afternoon Scanning Drill Cores – Practical  

Friday, September 23 2022

Morning

Identification of Features in Borehole Logs with Well Cad Software
Acoustic  
Optical
Practical with Well CAD

Thomas Niederhuber,
Birgit Müller

Afternoon Practical with Well CAD Thomas Niederhuber,
Birgit Müller

Participants should have their own Computer for the software trainings.
Participants should keep a digital field log, with notes about what they have learned and also with tables of e.g. scanned cores, picked features, photos etc.